I've got a Korean site at intcultcom.kr, and when I create a visual sitemap , the blog posts aren't showing up as being subcategories of the blog. But I want to give the blog a Korean URL, not English. Can I just write Korean in the "Custom rewrite slug" and have that show up in the slug?
Meta Box does not have an option to rewrite slug of the default WordPress post. If you want to change the permalink of the default post, you can go to Settings > Permalinks.